Microsoft Access displays a list of controls that the selected control can be changed to. If a type of control appears dimmed on the menu, you can't change the selected control to that type of control.
When you change a control to another type of control, Access copies the appropriate property settings from the original control to the new control. If a property exists for the original control but not for the new control, Access doesn't copy that setting. If a property exists for the new control but not for the original control, Access sets the property to the default control style for that type of control.